4 Part 1: Pertechnetate Flashcards
1
Q
what is the oxidation state of the Tc atom?
A
-1 to +7
2
Q
when SC is binding to Tc, what is the oxidation state of Tc?
A
+7
3
Q
central metal cation
A
Tc + surrounded by oxygen atoms
4
Q
where does localization of Tc occur (within first hour)?
A
gastric mucosa, thyroid, salivary glands
5
Q
how does Tc get excreted?
A
primarily through the kidneys over the first 24 hours, then the bowels after that
6
Q
critical organ of Tc
A
large bowel
7
Q
what are the two main patient uses of pertechnetate?
A
- thyroid scan
- meckel’s scan (gastric mucosa)
8
Q
__ % accumulates an hour from injection in the thyroid
__ % accumulates an hour from injection in the stomach
A
thyroid - 2%
stomach - 20%
9
Q
dose needed for a thyroid scan
A
74-370 MBq IV
10
Q
dose needed for an ectopic gastric mucosa
A
in adults:
370-555 MBq IV
kids:
7.4-11.1 MBq/kg
